This was an amazing place! The Hexagons - Giant's Causeway, interlocking basalt columns, the result of an ancient volcanic eruption. Located in Northern Ireland, it was declared a World Heritage Site by UNESCO in

Fingal’s Cave, Inner Hebrides, Scotland. "Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, part of a National Nature Reserve owned by the National Trust for Scotland" via Wikipedia.

GIANT'S CAUSEWAY, Bushmills, Antrim, Northern Ireland -- Northern Ireland's most popular tourist destination: this large stretch of staircase-shaped rocks is the result of cooled lava from volcanic eruptions that took place over 65 million years ago.